Learn about some of the most devastating floods in U.S. history, where rising waters, massive destruction, and powerful stories of survival left lasting marks on communities across the nation.

The Pittsburgh flood of 1936 was one of the worst floods in the history of the city. Here's a look at what happened 90 years ago.

Add Yahoo as a preferred source to see more of our stories on Google. The Pittsburgh flood of 1936 was one of the worst floods in the history of the city. Here's a look at what happened 90 years ago.